Application Number: 00107443Application Date: 2000.05.15Publication Number: 1269454Publication Date: 2000.10.11Priority Information: International: E21B43/00;F04B47/00Applicant(s) Name: Xu GuodongAddress: Inventor(s) Name: Xu Guodong;Xu WeiPatent Agency Code: 00000Patent Agent: Abstract By utilizing principle of balance and principle of equipotential energy and under the condition of that the pump-hanging depth, rod weight and pump diameter (liquid column) of two adjacent cluster wells are identical it uses smaller power to drive two pumping wells to alternatively pump oil. At the same time of that the first well is in upstroke and produce oil the second well is in downstroke, and after first well upstroke is completed, through electromechanical speed-reducing and phase-changing treatment, the second well is changed into upstroke, and the first well is in downstroke to implement alternative oil-pumping work of two wells.